Rotary valve



Feb. r4g'1928. 1,659,078

P. R. BROWN ROTARY VALVE Filed June 12, 1926 fr? f8 'Iii Persiani Feb. 14, i928;

rAUL a BROWN, Jo'r vocnLiin,1 iiirliisiiING'fifon` `ncrrARv vAL'vEH.`A` p VAppli'.cation filed .Tu-ne 12, 1.926;k Serial ANol.*"1\1i,"66l-1;

The present invention relates to improvements in rotary valves for internal combustion engines,for distributing and controlling the admission offfuelcharges `to the cylinders of the engine and foi-exhausting gases of combustionyfrom theienginecyliib ders. A rotr-rjwvalve is also used inilconne'e-, tion lwith the enginevfor regulating or governine' the admission of the oharojeltothe` cylinders, said valve being. adjustable for varying the yquantity of the charge 'passing from the distributing rotary 'va-lifetothe cylinders. The distributingvalveis operatedV with suitable timing gears or `other mechanism from theengine', and is of the n multiple type with inlet and exhaust ports angularly arrangedl for-proper sequencelin admitting fuel gas and; exhausting speiitgas f toiandviroin the engine cylinders.

Thermahexpansion devices are utilized in connection With"tlielpluralitv Aof ,plugs of:

the multiple valve to movel the plugs forthe purpose of preventing sticking under high temperatureinthe Wallslolf the valif'ecasing, and other meritorious 'featuresjare `utilized kin the combination and arrangementfof:parts as will hereinafter be inore'ffully set forth and claimed; Y -A e In the accompanyingHdraivings I have illustrated one `'complete example of Hlthe ph ysieal embodiment of. my .invention in connection with a four cylinder typeof engine, wherein lthe parts are combined .and ai'.-

`ranged according to the `best .mode I have thus far .devised for tlieipracticalr application of the principles of my invention, but it ivill,

Figure 3 is a longitudinal vertical sectional view as at line 3 3 of Figure 1 through the valve casing and showing the rotary valve in full.

Figure 4 is a detail sectional view of one of the valve plugs and part of another valve plug, illustrating in detail a thermostat connection rbetween the adjoining valve plugs, which/it .will be understood are relatively movable, longitudinally Abutf rotate together. "ln thefdra'wings I' have,illustrated acon ventionalf form of# fourfcylinder internal combustion engine, 'but .it will be understood tll at .the rotary valve finay beusedrin connection withjsix, eight and yotheiytypes ofjfengine's. i v.ln/.order that .the igeneralarrangement indlrclation of v.parts may ,readily be .understoodl have .indicated in Figure 1 onel of the cylinders as `J1 with its piston 2 and spark plug@ inthe cylinder head 4. At

one.` side iof. the: cylindery 'hea-d fashioned a longitudinally extending, horizontal valve' casing 5 having..anzinterior valve chamber `16', ivliieh ast shown i tapers from Vthe leftto 'the ,right end in Figure .3, and the usualfwvater 'jacket 7 is provided 'fori the 1valve'casing vin v communication with. the `Water' jacket of the engine.y i. l .lach of tlielfoiir cylinders ofthe engine is. provided with an vupwardly arched kror curved intake.; port .as 8', 9, 10,an`d 11j ar-l ranged f transversely. .of Y the f engine. and `extending from the .cylinder to. the intake manifold/12 which 'receives fuel gasfrom theacarbureter. 18. ,v

The rotarydistributing kvalve is lof the` multiple type yand'comprises a` plurality of spaced, axially aline'dftapeiing plugs 14., 15, 16', and 17flocat'ed.- in :the 'correspondingly tapered valve chamber.` These plugs are relzitively. movable longitudinally of the fasing,;but are connected to rotateitogether and continiioiislyiavhen the'engine is runing keys 1f.) :indient-.ended at tlieirwpends into liets 20 at the opposite ends of the inten mediate vplugs' and provided in the inner ends of the end plugs. The valvestem 21 Whichis secured to the plug 14 is journaled in bearings in the screw plug Q2 that closes one end of the valve easing, and a driven kwheel 23 on the "shaftand chain 24 are in` dicated kas the valve operating mechanism actuated from the crank shaft of the engine for continuouslyrotating the multiple valve. he ports 2,5 for intake of fuel gas and the` ports 26 in the plugs for exhaust of spent gases of combustion, are so arranged in combination with the valve operating meehfV anism and crank shaft of the engine as'to admit fuel, and exhaust gases, in the proper sequencesfor running of the engine.

The inlet ports which curve transverselili ly through the plugs intermittently register with the inlet ports 8, &c., of the valve easing, and the exhaust ports 26 of the valve plugs intermittently register with complementary exhaust ports in the valve casing, indicated as 28 in Figure 2, it being understood that each cylinder has an exhaust port and the four exhaust ports disposent the gases oitl combustion through the exhaust manifold 29 in Figure 2. c i a The multiple-plug valve isy urgedtoward the smaller end oi the tapering valve chamber by means ot a spring` 30 interposed between the end valve-plug la and the screwplug or closure 22 at the end of the valve chamber. However, to prevent sticking of the rotary valve within the walls ol the valve chamber due to excessive heat from combustion within the cylinders or from the passage of the exhaust gases through the several valve plugs, thermal controlled means are provided for transmitting motion to the relatively, rlongitudinally movableplugs. rlhus when the plugs are heated to such a` temperature as might cause sticking ot' the plugs or a retardation of' their rotary movement, under thermal eX- pansion the plugs are slid or moved towardy .the larger end ot the tapering valve chamber, thus compensating for the increased diameter of the plugs under heat expansion.

To cause this transmission ot motion to the plugs, due to thermal expansion I employ a multiple-element thermostat comprising preferably alined, spaced bars 31 composed of material having a different coeticient ot thermal expansion than the material ot the plugs. These bars are interposed between adjoining valve plugs and between the smallest plug and the end wall of the valve chamber, with one end ot thebar fixed 'in a plug and the outer, free end of the bar in Contact with the face of an adjoining plug or against the inner 'face ot the end wall of the valve chamber. Byv this arrangement of parts it. will be apparent thatunder thermal expansion of the bars in Figure 3 the spaced plugs will be moved to the lett, the keyed short shafts 18 between the plugs permitting this sliding movement.

is best seen in Figure 4l the bar 3l ex- 4tends into a large bore 32 arranged longitudinally of the plug and its threaded end 33 is screwed er passed through-a reduced extension ot the bore and secured by a nut 3a in the counterbore 35 at the opposite end oi the plug.

The multiple rotary valve continuously rotates while the engine is running to distibute the fuel charges and to dispose of the gases oi combustion, For regulating the admission ot the `fuel gas from the rot-ary valve to the cylinders l employ a regulating throttle valve 36 located between the distributing valve and the cylinders and arranged parallel with the rota-ry valve. A plurality of transversely curved ports 37 are arranged in the regulating valve to register with the several ports S, 9, 10 and ll ot the valve casing, and the available openings'i'or passage oit t'uel gas through these ports 37 are regulated by manually controlled operating mechanism 38 accessible as from the dash board or instrument board et an automobile. By Vmanipulating the valve operating ymechanism 3S the desired quantity ot fuel gas may be admitted to the cylinders.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is- The combination with a tapered valve chamber and casing having inlet and exhaust ports, of a tapered rotary valve comprising spaced plugs having ports therein, keyed shafts connecting said plugs to permit longitudinal movement` thereof, and thermal expansion bars carried by the plugs for contact with adjoining plugs for longitudinally moving said plugs.

In testimony whereof I at'rix my signature.

PAUL R. BROWN. 

